/*
 * Copyright (c) 2011, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <ecto/ecto.hpp>

namespace ecto
{
  namespace bp = boost::python;

  struct PassthroughN
  {
    static void
    declare_params(tendrils& parms)
    {
      parms.declare<bp::object>("items", "The inputs/outputs to passthrough. Should be a dict of {name:docstring}.");
    }
    static void
    declare_io(const tendrils& parms, tendrils& in, tendrils& out)
    {
      ECTO_SCOPED_CALLPYTHON();
      bp::object obj;
      parms["items"] >> obj;
      if (!obj || obj == bp::object())
        return;
      bp::list l = bp::dict(obj).items();
      for (int j = 0, end = bp::len(l); j < end; ++j)
      {
        bp::object key = l[j][0];
        bp::object value = l[j][1];
        std::string keystring = bp::extract<std::string>(key);
        std::string docstring = bp::extract<std::string>(value);
        in.declare<tendril::none>(keystring, docstring);
        out.declare<tendril::none>(keystring, docstring);
        out[keystring] = in[keystring];
      }
    }
  };
}

ECTO_CELL(cells, ecto::PassthroughN, "PassthroughN", "Passes through N objects of any type.");
